Nano-organosiliconorganosilicon and polyurethane composite waterproof emulsion

A technology of nano-organic silicon and composite polyurethane, which is applied in the direction of liquid-repellent fibers, fiber types, textiles and papermaking, and can solve problems such as water resistance and insufficient mechanical properties

Active Publication Date: 2019-04-26
浙江东进新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The macromolecular chain of water-based polyurethane contains a large number of water-soluble groups, which is slightly insufficient in water resistance and mechanical properties.

Method used

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  • Nano-organosiliconorganosilicon and polyurethane composite waterproof emulsion
  • Nano-organosiliconorganosilicon and polyurethane composite waterproof emulsion
  • Nano-organosiliconorganosilicon and polyurethane composite waterproof emulsion

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preparation example Construction

[0031] The preparation method of double-terminal alkenyl organosilicon monomer:

[0032] In a dry four-necked flask equipped with a thermometer and a stirrer, add a certain amount of 1,3-divinyl-1,1,3,3-tetramethyldisiloxane and octamethylcyclotetrasiloxane , heated up to the reaction temperature while stirring, and added a certain amount of trifluoromethanesulfonic acid, and kept the temperature for a certain period of time. After the reaction, add anhydrous Na 2 CO 3 Stir and neutralize to pH 6-7, filter and distill the product under reduced pressure (90°C, vacuum degree below -0.1Mpa) to remove unreacted monomers to obtain a colorless and transparent liquid product. The reaction process involved is shown in (1).

[0033]

[0034] Monovinyl silicone monomer is prepared by reacting 2-(trimethylsiloxy)ethanolamine with allyl chloride. The preparation method is:

[0035] In a 250 mL three-necked flask, 1 mol of 2-(trimethylsiloxy)ethanolamine, 1.5 mol of triethylamine an...

Embodiment 1

[0042] A nano-organosilicon composite polyurethane waterproof emulsion, which is composed of nano-organosilicon emulsion and water-based polyurethane emulsion. In terms of mass percentage, the nano-organosilicon emulsion is 34% and the water-based polyurethane emulsion is 66%;

[0043] Described nano silicone emulsion is made of vinyl nano SiO 2 Sol, double-terminated alkenyl silicone monomer (as shown in formula 1), monovinyl silicone monomer (as shown in formula 2), emulsifier, water, and initiator are prepared by emulsion polymerization;

[0044]

[0045] (H 3 c) 3 Si—O—CH 2 CH 2 NH-CH 2 CH=CH 2 Formula 2

[0046] Described aqueous polyurethane emulsion is made of polyether glycol, diisocyanate, dimethylol propionic acid, dihydroxysilane monomer (as shown in formula 3), triethylamine, ethylenediamine, catalyst, organic solvent, water reaction made;

[0047]

[0048] The vinyl nano-SiO 2 Sol, made of vinyl silane coupling agent, catalyst, water, emulsifier, the...

Embodiment 2

[0061] A nano-organosilicon composite polyurethane waterproof emulsion, which is composed of nano-organosilicon emulsion and water-based polyurethane emulsion. In terms of mass percentage, the nano-organosilicon emulsion is 41% and the water-based polyurethane emulsion is 59%;

[0062] Described nano silicone emulsion is made of vinyl nano SiO 2 Sol, double-terminated alkenyl silicone monomer (as shown in formula 1), monovinyl silicone monomer (as shown in formula 2), emulsifier, water, and initiator are prepared by emulsion polymerization;

[0063]

[0064] (H 3 c) 3 Si-O-CH 2 CH 2 NH-CH 2 CH=CH 2 Formula 2

[0065] Described aqueous polyurethane emulsion is made of polyether glycol, diisocyanate, dimethylol propionic acid, dihydroxysilane monomer (as shown in formula 3), triethylamine, ethylenediamine, catalyst, organic solvent, water reaction made;

[0066]

[0067] The vinyl nano-SiO 2 Sol, made of vinyl silane coupling agent, catalyst, water, emulsifier, t...

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Abstract

The invention discloses a nano-organosilicon and polyurethane composite waterproof emulsion. The emulsion is characterized by being composited from the components in percentage by mass as follows: 34%-47% of nano-organosilicon emulsion and 53%-66% of a waterborne polyurethane emulsion, wherein the nano-organosilicon emulsion is prepared from vinyl nano-SiO2 sol, a double-ended alkenyl organosilicon monomer, a monovinyl organosilicon monomer, an emulsifier, water and initiator by emulsion polymerization; the aqueous polyurethane emulsion is prepared from polyether glycol, diisocyanate, dimethylol propionic acid, dihydroxysilane monomer, triethylamine, ethylenediamine, a catalyst, an organic solvent and water. Hydrophobicity of the textile surface can be improved by increasing coarseness ormodifying the surface with low surface energy substances. Polysiloxane is used as a low surface energy material and nano-SiO2 is used for forming roughness to be combined with water-based polyurethane, and accordingly, good water repellency is achieved, and adhesion of organosilicon is improved.

Description

technical field [0001] The invention relates to a waterproof emulsion, which is composed of nano-organic silicon emulsion and polyurethane emulsion, and belongs to the field of nano-functional materials. Background technique [0002] Polyurethane is a block polymer, which generally consists of flexible long chains of oligomer diols, and hard segments of polyisocyanate and chain extenders. It has the advantages of wear resistance, good flexibility, and strong adhesion. It is widely used in the field of textiles. For environmental reasons, water-based polyurethane has gradually replaced solvent-based polyurethane. The macromolecular chain of water-based polyurethane contains a large number of water-soluble groups, which is slightly insufficient in terms of water resistance and mechanical properties. [0003] The invention intends to use nano-organic silicon emulsion to modify water-based polyurethane, introduce Si-O-Si and Si-C into the emulsion system, reduce surface energy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L83/04C08K3/36C08G18/75C08G18/66C08G18/48C08G18/12C08G18/34C08G18/32D06M15/568D06M15/643D06M101/32
CPCC08G18/12C08G18/348C08G18/4825C08G18/6692C08G18/755C08K2201/011C08L75/08D06M15/568D06M15/643D06M2101/32D06M2200/12C08L83/04C08K3/36C08G18/3893C08G18/3228
Inventor 陈明贤孙立新董洪波
Owner 浙江东进新材料有限公司
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